science. why all the planets and stars are spherical in nature.?

Answer 1

Yes, Planets & stars seem to be spheres, not cubes or cylinders or oddball rocky shapes. Some smaller bodies such as asteroids or Mars moons Phobos and Deimos, do have odd shapes, but larger bodies like the nine planets and most of their moons do look like spheres. That's because of the nature of gravity. You can think of gravity as a force that points inward toward the center of the planet so that every part of the surface is pulled evenly toward the center, resulting in a spherical shape.
Of course, planets are not perfect spheres because mountains and valleys and even skyscrapers are all deviations from the spherical shape. However, as planets get larger, gravity gets stronger, until eventually large objects on the surface are crushed under their own weight. That's why we don't have mountains that are 50 miles high or skyscrapers that are 2,000 stories tall. Planets stay basically spherical because any large deviations get crushed.

Although gravity keeps planets close to spherical, there are other forces that cause deviations from the basic spherical shape. For example, the rotation of the earth once every 24 hours, causes an apparent centrifugal force which creates a bulge at the equator. In fact the earth's diameter at the equator is 7,926 miles while the diameter between the poles is only 7,900.

Answer 2

why Earth is spherical... there is a simple answer for that, when earth was born it was a cloud of gases and with due course of time when the gasses started to gather around each other they started to make a dense cloud and with increase in the density the started to make a gravitational pull towards each other and as you all know that when we have a round shape gravitation pull on all the particles which are situated at the same distance from the core is same, so slowly and steadily it became a very big sphere and rest you all know how it became solid. Now u will think that it is not exactly spherical but elliptical. this is because the speed at which earth is revolving it also throws everything out and when they spin polar regions move towards the core as the speed of rotation is less on polar region and a bit expanded on the equator that the reason why earth is spherical.

Answer 3

If you know the concept of Potential Energy you can make the "gravity pulls it all in as closely as possible" argument more precise.

Here's another way to look at it. The dominant force controlling the shape is gravity. And gravity is symmetric in all directions. So to a first approximation, the shape should be symmetric in all directions -- i.e., spherical.

The extent to the which stars and planets are not spherical is the extent to which other forces (or initial momentum) have effects. These effects are much smaller than that of gravity, and hence the shapes are very close to spherical.

Note: "Symmetric in all directions" is a bit of sloppy phrasing, but even professional physicists and mathematicians wouldn't call it downright wrong.

Answer 4

As we know the gravity of any body is mainly concentrated in its core so, for the core to have an uniform gravity on the surfarce of the body, it has to be spherical (because the distance of any point on the surface of the sphere from the centre is equal)

Answer 5

Centrifugal force. The spinning of the gassious cloud that forms the orb makes it spherical as it compresses.

Answer 6

everything is in spherical cuz of the gravitational pull from the core
and that is also how the big bang created

Answer 7

Only for the the total surface area is minimum. only because of this reason all the liquids assign spearical shapes when they are scattered. since the earth is a fluid when it is sepparated from the earth.
total surface area is the only reason

Answer 8

mathematically sphere takes up less volume than any other shape.
So, when gravity pulls the gases or objects around it, It tries to minimize the volume as much as possible

Answer 9

I guess spheres offer the most resistance to gravity.